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Air/Fuel Ratio Control in Diesel-Dual-Fuel Engine by Varying Throttle, EGR Valve, and Total Fuel
Technical Paper
2010-01-2200
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
From our experiences in converting diesel engine into diesel-dual-fuel engine with natural gas as primary fuel, accurate air/fuel ratio control is vital to the high engine performance, good vehicle drivability, and low emissions. Two components enter in calculating the air/fuel ratio, namely, the amount of fresh air and the amount of diesel and natural gas. Throttle and EGR valve are two actuators directly affect the amount of air, and the desired total fuel determines how much fuel should be injected at an instance. As opposed to inactive, fully opened throttle in typical diesel engine, the throttle in diesel-dual-fuel engine is regulated to cover wider range of desired air/fuel ratio. As a result, the problem of controlling the amount of air in diesel-dual-fuel engine becomes that of multi variables in which both throttle and EGR valve are involved. We present a novel algorithm that breaks the multi-variable control problem into two single-variable problems. The throttle and EGR valve are regulated one at a time as determined by a switch-and-hold logic that optimizes the throttle opening to reduce pumping loss. An algorithm is also proposed to prevent the throttle from fully closed. Because the fuel path is much faster than the air path, including in the algorithm is the adjustment of the desired total fuel according to the air/fuel ratio tracking error. We found that adjusting the total fuel within a limit helps improve the transient response. Experiments were performed on an engine test bed and a pickup truck; both engines were modified from four cylindrical diesel engines to run diesel-dual-fuel, where the natural gas is injected at each intake port. The test bed experiment showed that the air/fuel ratio was accurately regulated with widest range possible. The pickup truck was commanded to follow the new European driving cycle. The results showed that the throttle opening was optimized at all time.
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Chatlatanagulchai, W., Rhienprayoon, S., Yaovaja, K., and Wannatong, K., "Air/Fuel Ratio Control in Diesel-Dual-Fuel Engine by Varying Throttle, EGR Valve, and Total Fuel," SAE Technical Paper 2010-01-2200, 2010, https://doi.org/10.4271/2010-01-2200.Also In
References
- Alfieri, E. Amstutz, A. Guzzella, L. “Gain-Scheduled Model-Based Feedback Control of the Air/Fuel Ratio in Diesel Engines,” Control Engineering Practice 17 1417 1425 2009
- Jung, M. “Mean-Value Modelling and Robust Control of the Airpath of a Turbocharged Diesel Engine,” Sidney Sussex College, Department of Engineering, University of Cambridge Cambridge 2003
- Jung, M. Glover, K. Christen, U. “Comparison of Uncertainty Parameterisations for H ∞ Robust Control of Turbocharged Diesel Engines,” Control Engineering Practice 13 15 25 2005
- Skogestad, S. Postlethwaite, L Multivariable Feedback Control: Analysis and Design Wiley 0470011688 2005
- Jung, M. Glover, K. “Calibratable Linear Parameter-Varying Control of a Turbocharged Diesel Engine,” IEEE Transactions on Control Systems Technology 14 1 45 62 2006
- Wei, X. del Re, L. “Gain Scheduled H ∞ Control for Air Path Systems of Diesel Engines Using LPV Techniques,” IEEE Transactions on Control Systems Technology 15 3 406 415 2007
- Liu, L. Wei, X. Zhu, T. “Quasi-LPV Gain Scheduling Control for the Air Path System of Diesel Engines,” 2008 Chinese Control and Decision Conference China
- Bengea, S. DeCarlo, R. Corless, M. Rizzoni, G. “A Polytopic System Approach for the Hybrid Control of a Diesel Engine Using VGT/EGR,” Journal of Dynamic Systems, Measurement, and Control 127 13 21 2005
- Stefanopoulou, A. G. Kolmanovsky, I. Freudenberg, J. S. “Control of Variable Geometry Turbocharged Diesel Engines for Reduced Emissions,” IEEE Transactions on Control Systems Technology 8 4 733 745 2000
- van Nieuwstadt, M. J. Kolmanovsky, I. V. Moraal, P. E. Stefanopoulou, A. Jankovic, M. “EGR-VGT Control Schemes: Experimental Comparison for a High-Speed Diesel Engine,” IEEE Control Systems Magazine 63 79 June 2000
- Dabo, M. Langlois, N. Chafouk, H. “Dynamic Feedback Linearization Applied to Asymptotic Tracking: Generalization about the Turbocharged Diesel Engine Outputs Choice,” 2009 American Control Conference USA June 10-12 2009
- Fredriksson, J. Egardt, B. “Backstepping Control with Local LQ Performance Applied to a Turbocharged Diesel Engine,” 2001 Conference on Decision and Control USA December 2001
- Utkin, V. I. Chang, H.-C. Kolmanovsky, I. Cook, J. A. “Sliding Mode Control for Variable Geometry Turbocharged Diesel Engines,” 2000 American Control Conference USA June 2000
- Jankovic, M. Jankovic, M. Kolmanovsky, I. “Constructive Lyapunov Control Design for Turbocharged Diesel Engines,” IEEE Transactions on Control Systems Technology 8 2 288 299 2000
- Chauvin, J. Corde, G. Petit, N. Rouchon, P. “Motion Planning for Experimental Airpath Control of a Diesel Homogeneous Charge-Compression Ignition Engine,” Control Engineering Practice 16 2008
- Ferreau, H. J. Ortner, P. Langthaler, P. del Re, L. Diehl, M. “Predictive Control of a Real-World Diesel Engine Using an Extended Online Active Set Strategy,” Annual Reviews in Control 31 293 301 2007
- Herceg, M. Raff, T. Findeisen, R. Allgower, F. “Nonlinear Model Predictive Control of a Turbocharged Diesel Engine,” 2006 International Conference on Control Applications Germany October 4-6 2006
- Suzuki, K. Shen, T. Kako, J. Oguri, Y. “Individual A/F Control with Fuel-Gas Ratio Estimation for Multi-Cylinder IC Engines,” 2007 American Control Conference USA July 11-13 2007
- Chauvin, J. Moulin, P. Corde, G. Petit, N. Rouchon, P. “Kalman Filtering for Real-Time Individual Cylinder Air Fuel Ratio Observer on a Diesel Engine Test Bench,” 2006 American Control Conference USA June 14-16 2006
- Wahlstrom, J. Eriksson, L. Nielsen, L. “EGR-VGT Control and Tuning for Pumping Work Minimization and Emission Control,” IEEE Transactions on Control Systems Technology 18 1 2010
- Shamdani, A. H. Shamekhi, A. H. Ziabasharhagh, M. “Air Intake Modelling with Fuzzy AFR Control of a Turbocharged Diesel Engine,” Int. J. Vehicle Systems Modelling and Testing 3 1/2 2008